CVE-2022-20784: medium-severity vulnerability in Cisco Web Security Appliance (WSA)
Cisco Web Security Appliance Filter Bypass Vulnerability
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.8epss 0.9%
A vulnerability in the Web-Based Reputation Score (WBRS) engine of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass established web request policies and access blocked content on an affected device. This vulnerability is due to incorrect handling of certain character combinations inserted into a URL. An attacker could exploit this vulnerability by sending crafted URLs to be processed by an affected device. A successful exploit could allow the attacker to bypass the web proxy and access web content that has been blocked by policy.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected products
Cisco · Cisco Web Security Appliance (WSA)Related CVEs — Cisco Web Security Appliance (WSA)
In the same product, most dangerous first.
CVE-2021-1359MEDIUMCisco Web Security Appliance Privilege Escalation VulnerabilityEPSS 1.9%CVE-2019-1817HIGHCisco Web Security Appliance Malformed Request Denial of Service VulnerabilityEPSS 1.8%CVE-2021-34749MEDIUMMultiple Cisco Products Server Name Identification Data Exfiltration VulnerabilityEPSS 1.7%CVE-2019-1672MEDIUMCisco Web Security Appliance Decryption Policy Bypass VulnerabilityEPSS 1.6%CVE-2019-1884HIGHCisco Web Security Appliance Web Proxy Denial of Service VulnerabilityEPSS 1.5%CVE-2021-34698HIGHCisco Web Security Appliance Proxy Service Denial of Service VulnerabilityEPSS 1.4%